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[ALSA] usb-audio: add SNDRV_PCM_INFO_BATCH flag 

USB generic driver
Add the SNDRV_PCM_INFO_BATCH flag to the PCM hardware information to
indicate that the driver uses double buffering.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
hifive-unleashed-5.1
Clemens Ladisch 2005-09-05 10:31:05 +02:00 committed by Jaroslav Kysela
parent 025cd2f6b1
commit 49045d3d4d
1 changed files with 10 additions and 6 deletions
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16
sound/usb/usbaudio.c
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@ -1439,9 +1439,11 @@ static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
static snd_pcm_hardware_t snd_usb_playback =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.buffer_bytes_max = (256*1024),
.period_bytes_min = 64,
.period_bytes_max = (128*1024),
@ -1451,9 +1453,11 @@ static snd_pcm_hardware_t snd_usb_playback =
static snd_pcm_hardware_t snd_usb_capture =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.buffer_bytes_max = (256*1024),
.period_bytes_min = 64,
.period_bytes_max = (128*1024),